_macos.h: define _MD_MINIMUM_STACK_SIZE to be 58K.

pruthr.c: removed unnecessary XP_MAC code since _MD_MINIMUM_STACK_SIZE is
checked by _PR_ADJUST_STACKSIZE.

nsprpub/pr/include/md/_macos.h

@@ -183,17 +183,16 @@ PR_EXTERN(PRThread *) PR_GetPrimaryThread();
 #define _MD_GET_SP(_t) (*((PRUint32 *)((_t)->md.jb) + 2))
 #define _MD_GET_TOC(_t) (*((PRUint32 *)((_t)->md.jb) + 3))
 #define INIT_STACKPTR(stackTop) ((unsigned char*)stackTop - 128)
-#define kDefaultMacintoshStackSize 58 * 1024
 #define PR_NUM_GCREGS 70
 #else
 #define _MD_GET_PC(_t) (*((PRUint32 *)((_t)->md.jb) + 6))
 #define _MD_GET_SP(_t) (*((PRUint32 *)((_t)->md.jb) + 12))
 #define INIT_STACKPTR(stackTop) ((unsigned char*)stackTop - 4)
-#define kDefaultMacintoshStackSize 58 * 1024
 #define PR_NUM_GCREGS 13
 #endif
 
-#define _MD_DEFAULT_STACK_SIZE kDefaultMacintoshStackSize
+#define _MD_DEFAULT_STACK_SIZE (58 * 1024)
+#define _MD_MINIMUM_STACK_SIZE (58 * 1024)
 
 /*
 ** Initialize the thread machine dependent data structure

nsprpub/pr/src/threads/combined/pruthr.c

@@ -1121,11 +1121,6 @@ PR_IMPLEMENT(PRThread*) _PR_CreateThread(PRThreadType type,
     native = (((scope == PR_GLOBAL_THREAD)|| (scope == PR_GLOBAL_BOUND_THREAD))
 							&& _PR_IS_NATIVE_THREAD_SUPPORTED());
 
-#ifdef XP_MAC
-    if (stackSize < _MD_DEFAULT_STACK_SIZE)
-    	stackSize = _MD_DEFAULT_STACK_SIZE;
-#endif
-
     _PR_ADJUST_STACKSIZE(stackSize);
 
     if (native) {